DOUBLE YOUR REBATE when you trade up to select 3M Fall Protection Products Get The Details

3M™ DBI-SALA® Ultra-Lok™ RSQ 50 ft Stainless Cable SRL, OSHA

This Ultra-Lok™ RSQ self-retracting lifeline features a quick activating speed-sensing locking system with reliable fall arrest energy dissipation. It has a 50 ft. stainless steel cable lifeline & snap hook as well as swiveling anchorage point.

SKU: 3503889

This product is the manufacturer’s recommended replacement for:
  • 3M™ DBI-SALA® Ultra-Lok™ Self Retracting Lifeline, Cable 50' (SKU: 3504552)
Available - Typically ships within 9 business days.
Save 30%

Dedicated to the pursuit of keeping workers safe at heights

The 3M™ DBI-SALA® Ultra-Lok™ Self-Retracting Lifeline (SRL) is durable, lightweight, and engineered for safety, efficiency, and reliability. It is available with synthetic rope, stainless steel, or galvanized steel cable lifeline material, and an aluminum or thermoplastic housing. The 3M™ DBI-SALA® Ultra-Lok™ SRL RSQ™ design is a dual-mode SRL for fall arrest and integrated rescue systems. Ultra-Lok™ is available in SRL, Retrieval SRL, and RSQ™ configurations.

The Ultra-Lok™ SRL extends and retracts with the users as they perform their work task. Should a fall occur, the speed sensing brake system will activate helping stop the fall and reducing the forces imposed on the user to safe levels. 3M™ DBI-SALA® Ultra-Lok™ Self-Retracting Lifelines feature quality and durable systems.

Ultra-Lok™ SRLs are rugged, yet extremely lightweight and superbly engineered devices you can count on for safety, efficiency, and comfort. Stainless steel components, an anti-ratcheting brake system, and a semi-sealed design provide the user with a system built to last. Our SRLs are backed by decades of proven field service for absolute confidence, safety, and reliability. The self-retracting lifeline will extend as the user moves away, and retract automatically enabling the user to move about within a recommended working area at normal speeds. Should a fall occur, a speed-sensing brake system will activate stopping the fall and reducing the forces imposed on the user to safe levels.

Product Highlights

  • RSQ™ dual-mode design
  • Rugged and extremely lightweight thermoplastic housing
  • Semi-sealed design
  • Stainless steel dynamic components
  • Internal energy absorption system
  • Anti-ratcheting twin disk brake system
  • Constant moving brake system pawls

3M™ DBI-SALA® Ultra-Lok™ RSQ 50 ft Stainless Cable SRL, OSHA Specifications *( 1,2 )

Model Number:
Product Series:
Product Category:
Cable & Rope SRLs, Single-Leg SRL
Length Option:
50 ft.
Anchor Connection Type
Anchor Hook Material
Stainless Steel
Anchor Material
Stainless Steel
Carabiner/Hook Material
Stainless Steel
Swiveling Anchorage
For Use With
Full Body Harness & Anchor Point
Harness Connection Type
Housing Material
Housing Type
Install Type
Portable & Removable
Leg Count
Lifeline Hook Material
Stainless Steel
Lifeline Length (Imperial)
50.0 ft
Lifeline Length (Metric)
15.2 m
Lifeline Material
Stainless Steel Cable
Maximum Number of Users
Mounting Type
Block to Anchor Point
Net Weight (Imperial)
18.97 lb
Net Weight (Metric)
8.6 kg
Product Color
Yellow, Silver
Product Series
Product Type
Self Retracting Lifeline - Cable
Recommended Application
Assembly, Maintenance, Inspection, Climbing
Recommended Industry
General Industry, Oil & Gas, Transportation, Metal Production & Fabrication, Mining, Wind Energy, Construction, Maintenance
Specifications Met
29 CFR OSHA 1910.140, 29 CFR OSHA 1926.502
Weight Capacity (Imperial)
310.0 lb.
Weight Capacity (Metric)
141.0 kg
Product Weight:
0 lbs.

Product Specification Disclaimer *( 1, 2 )

*1. Manufacturer's specifications are supplied by the manufacturer and are subject to change without notice. The data and information contained in these specification sheets are representative; the ratings supplied are suggested as guidelines and should only be used for evaluating your specific application.

**2. Although Reliable Electric Products Company Inc. has made every effort to ensure the accuracy of information by third parties, it is ultimately the customer’s responsibility to validate these specifications to ensure they are suitable for SAFE use in a particular application. Reliable Electric Products Company Inc. disclaims to the extent permitted by law, any warranty or liability.

Manufacturer's Extended Intended Use Disclaimer

3M industrial and occupational products are intended, labeled, and packaged for sale to trained industrial and occupational customers for workplace use. Unless specifically stated otherwise on the applicable product packaging or literature, these products are not intended, labeled, or packaged for sale to or use by consumers (e.g., for home, personal, primary or secondary school, recreational/sporting, or other uses not described in the applicable product packaging or literature), and must be selected and used in compliance with applicable health and safety regulations and standards (e.g., U.S. OSHA, ANSI), as well as all product literature, user instructions, warnings, and other limitations, and the user must take any action required under any recall, field action, or other product use notice. Misuse of 3M industrial and occupational products may result in injury, sickness, death, or property damage. For help with product selection and use, consult your on-site safety professional, industrial hygienist, or other subject matter expert.

3M™ DBI-SALA® Ultra-Lok™ Self-Retracting Devices - User Instructions

Open | Download

3M™ Personal Safety Products - Firefighting Notice

Open | Download